Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only says 'Latitude and longitude for a place via Open-Meteo,' but does not explain that it makes an external API call, how inputs are handled (many are described in the schema as 'discarded'), or what the response format looks like. The description fails to disclose side effects, failure modes, or the nature of the 'hint' mechanism.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence, which is concise and front-loaded with the core purpose. However, it is too sparse for a tool with 9 optional parameters and no other context. Conciseness is achieved at the expense of necessary detail, making it under-specification rather than effective brevity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of the input schema (9 optional parameters), no output schema, and no annotations, the description is extremely incomplete. It does not mention output structure, error behavior, or how to select among the many parameters. An agent cannot reliably invoke this tool correctly without significant guessing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has 100% description coverage, and each parameter has a brief description (e.g., 'City name for a public weather hint; discarded after the call'). However, the tool description does not explain how these parameters relate to the stated purpose of obtaining latitude and longitude. The schema alone does not tell the agent which parameter to use or whether they are mutually exclusive. The description adds no semantic value beyond what the schema provides, and it fails to clarify the primary input.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states that the tool returns latitude and longitude for a place via Open-Meteo, which identifies the core action and resource. However, it does not clarify how the many input parameters relate to obtaining that place, and the name 'geo-hint' suggests a hint or validation role rather than a direct geocoding service. The purpose is too vague to distinguish this from other sibling tools that also handle location or weather data (e.g., weather-hint, timezone).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool versus alternatives. The description does not mention intended use cases, prerequisites, or which scenarios it applies to. With siblings like weather-hint and timezone, an agent cannot determine if geo-hint is the right choice without additional context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.